Machine for sewing on buckles



Jan. 19 1926. 1,569,902 J. VOLLMAN I MACHINE FOR SEWING 0N BUCKLES Filed Au ust V18. 1922 2 Shasta-Sheet l WITNESSES INVENTOR Joseph Vol/man Jan. 19 1926.

v J.-VOLLMA N K MACHINE F03 s'nwma on BUCKLES Filed August 1 1922 Ill mi 2 Sheets-Sheet 2 Patented Jan. 19, 1926.

UNITED STATES 1,569,902 PATENT oFFicE.

JOSEPH VOLLMAN, or ELIZABETHMNLEW JJEBSIEY.

MACHINE FORSEWINZG ON BUCKLES.

Application filed August 18, 1922. :S eri al No. 582,602.

To (:ZZ whom it may concern.

Be it known that I, J osnrH VoLnMAN, a citizen ofthe United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in lWIachines for Sewing on Buckles, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has for an object to provide a machine for securing a flexible tapeloop in snugly interlinked relation with an apertured article, such as abuckle, so as to eliminate looseness or play between the interlinked loop and article. More specifically,.th,e invention has for an object to pro-- videa machine for securing buckles with tape-loops previously attached, to gaiters and the like, in such a manner as to sub stantially eliminate the end play of the buckles in their attaching loops. Another object of the invention is to provide the machine with means for attaching strapmembers complementary to the buckles.

The invention preferably comprises a sewing machine having stitch-forming mechanism and a work-holder with feeding means for relatively moving them tosew a group of stitches through the tape-loop. For sewing on buckles, the feeding means preferably effects such relative movement as will cause the stitchesto be laidin --a rectangularfigure within the outline of the tape-loop, although the preciseform of the stitched figure is immaterial, solong ascertain of the stitches are laid close to the article or buckle. The work-holder of the machine preferably comprises an article article. When utilizing a sewing machine having a movable work-holder, the articleguide maybe mounted upon a' lower workclamping plate adapted to. move over the throat-plate of the machine. In this casethe'presser-device will be mounted .to

move with the lower work-clamping plate and will .clamp the tape-loop upon said plate. For attaching strap-.members the lower work-clamp plate is so-made as to be readlly removable and replaceable by a substitute work-clampi-ng plate having strap and workpositioning guides.

In the accompanying drawings, Fig. 1 is a fragmentary front side elevation of a sewing machine embodying the invention. Fig. 2 is a top. plan view of the work holder ofithe machine. Fig. 3 is a section onthe line 3, 3, Fig. 2. Fig. 4 is a perspective view of the lower member of the work-clamp. Fig. 4;is a perspective view of a buckle and tape-loop in position to be applied to the lower work-clamping member shown in Fig. .4. Fig. 5 is .a bottom perspective view ofthe presser-feetconstituting the two-part presser device of the machine. Fig. 6 is a detail front elevation of the presser-bars carrying the presserfeet shown in Fig. 5. Fig. 7 is a plan view of abuckle as sewed to a body-fabric by the machine. .Fig. 8 is a-front end elevation of the parts of the machine adjacent the sewing point. Fig. 9 is a perspective view of a substitute work-supporting plate for attachnga strap-member complementary to a jbuckle. Fig. 10 is a plan view of the work-supporting plate, shown in Fig. 9 with a strapdnember positioned therein, and Fig. 11 is .a section, similar to Fig. 3, showingithe cooperation ofthepresser device with the substitute work-supporting plate shown in Fig. 9. i

For the purpose of the present disclosure, the invention will be described as embodied in a sewing machine having a movable work-holder of the well known type .disclosed in; the patent .to Barron, No. 1,194,588 of August 15, 1916. Machines of this type comprise the usual stitch-forming mechanism, represented by the reciprocating needle 1, and the bed-plate12 overwhich the work-holder 3 is moved inthe desired path by the usuallateral and longitudinal cam-' and; nut 6f, 6?,al d Steady pins- 6, the' lower ivork supporti ng plateG formed with a rectangular aperture 7 surrounded by serrations 8 and exposing the apertured throatplate 9 through which the needle 1 reciprocates. The overhanging arm 10 of the work-holder, which carries the resser-device to be described, is mounted as usual on the bar 5 but is set at an angle to the latter when viewed in plan, Fig. 2, to rearwardly ol'lset the head 11 from the sewing point.

\Vhen articles such as buckles are to be attached and are of the usual form comprising the side bars 12, end-bars 13, central bar Ll and tongue 15, the tape-loop 16 may enclose the end bar 1%.), remote from the tip of the tongue 15, and customarily has its ends over-seamed together at 17. To properly position such a buckle and, tapeloop relative to the sewing point, a buckleguide 18 may be provided. When, as in the present instance, the machine embodies a lower movable worlcsupporting plate 6, the buckle-guide 18 is mounted on such plate adjacent the aperture 7. Preferably the buckle-guide comprises an upstanding guide block of rectangular t'orm having a transverse recess or groove 19 adapted to receive the cross bar 1+1- of the buckle, and a clearance notch 20 for the looped-end 21 of the buckle-tongue The width of the block 18 is substantially equal to or slightly less than the distance between the side bars 12 of the buckle, as shown in Fig. 2, and the block is formed with an end wall 22 which is adapted to crowd the folded end 23 of the tapeloop 16 closely in contact with the adjacent end bar 13 of the buckle, as shown in Fig. 3. The guide-block 18 may also be formed with a supporting face 2% for the free end of the buckle. The side walls 25 of the guideblock 18 position the side bars 12 of the buckle. \Vhen the buckle is placed in position on the guide-block 18 the tape-loop 16 will be located in sewing position over the aperture 7 in the plate 6. It is to be understood that the exact form of the articleguide is immaterial so long as it presents a surface or upstanding wall, such the surface 22, tor crowding a tape-loop close to the bar of the buckle which the tape loop encloses.

The body-material 26, to which the buckle is to be attached, is placed over the tapeloop with its edge 27 substantially in line with the outer surface portion of the end bar 13 of the buckle, as shown in Fig. 3.

The work is clamped in sewing position by means of a presser device which preferably comprises two independently movable feet 28, 29, carried by the respective presserbars 28, 29, mounted to slide vertically in the head 11. The bars 28', 29 are notched at their upper ends at 30, Fig. 6, to receive the pins 31 carried by the equalizer bar 32 which is slotted at 33 to lit over the uppen ends of the presser-bars and is crowned at an to centrally receive the pressure of the leal-spring mounted on the arm 10 in the usual n'lanner. The presserbars 28, 29, are formed with lateral lugs 28", 29", which slide in the guideways 36, 37, in the head 11 and steady said bars against turning about vertical axes.

In the embodiment of the invention illustrated, the presser-feet 28, 25), taken together, form a rectangular clamping frame having a rectangular sewing aperture registering with the aperture 7 in the lower clamping plate 13. The foot 28 clamps the work on three sides of the aperture 7 while the foot 257 indepeiulently clamps the work along the fourth side of the aperture 7 ad jacent the buckle-guide 18. By referring to Fig. 5 it will be seen that the lower face of the tool 2!) is formed with a serrated workengaging rib 88 which projects below the adjacent smooth lower face-portion 39 of such foot. The rib 38 tends to tighten or draw the tape-loop 16 snugly about the end bar 13 of the buckle as the foot 2!) is lowered into clamping engagement with the work. The under face portion 1:59 of the foot 29 also presses the upper and under portions of the tape-loop snugly into cngageu'ient with the upper and under or contiguous portions of the bar of the article.

The presser-l'eet 28, 29, may be lifted by means of the usual manually operated prcsser lifting bar an on the lower end of which is mounted the bracket ll having an oll'set arm 12 extending under the pins 13, 44, which project forwardly from the respective presser-bars 2t, 29. By varying the relative elevations of the pins 4-2 44-, on the bars 28, 29, the feet 28, 29 may be lowered into engagement with the work simultaneously, or either one in advance of the other, as may be desired.

In the )articular embodiment ot the invention illustrated. the tree end oi the workholder is moved in a rectal'igular path to cause the stitches to be laid in the form of a rectangle, as shown in Fig. T. By the means described, the buckle is securely fastened to the body-material and is substantially free from end play relative to its attaching loop 16.

A strap-member a5, complementary to the buckle, may also be attached to the gaiter or other article, by means of the machine above described. To this end, the detachable worksupporting plate 6, known technically as a feed-plate, may conveniently be replaced by a substitute feed-plate l6 having a sewing aperture 47 identical in form and position with the aperture 7 in the feed-plate 6. The teed-plate at may be provided with an end edge guide 48 and side edge guides all), 50, for positioning the squared end of the strap member over the sewing aperture t? in the feed-plate. The body-material 51, to which the strap 45 is ill] Hill

to be attached, is placed over the strap as shown in Fig. 11 and clamped in position by the presser device 28, 29; the guides 49 and 50 being preferably of about the same height as the combined thickness of the strap and body material. The forward ends 52, 53 of the guides 49, 50 may serve to position the edge 54 of the body material, either by contact or by sight, depending upon the height of the guide walls 49, 50 and the thickness of the strap member 45.

Having thus set forth the nature of the invention, what I claim herein is:

l. A work-holder for article-attaching sewing machines comprising, a work-support having an upstanding guide adapted to be embraced by and to position an apertured article,said guide having an upright wall adapted to engage a loop of flexible material linked with said article and crowd such loop closely in contact with the inner wall portion of the article embraced thereby, and a presser-member movable toward and away from said worksupport and having a work-engaging surface portion disposed at one side of and closely adjacent said upstanding wall and adapted to press the upper and under portions of such loop snugly into engagement with the upper and under wall portions of the article.

2. A work-holder comprising separable work-supporting and presser members and a buckle positioning guide mounted on the work-supporting member at one side of the presser member, said guide having a trans verse groove adapted to receive the crossbar of a buckle and an end surface substantially parallel to said groove and between the latter and the presser member for crowding a loop of flexible material, surrounding gne end-bar of a buckle, close to said end- 3. A work-holder comprising a movable support and separable work-supporting and presser devices carried thereby, the presser device being split to form two independenta ly and. vertically movable presser members", and a buckle positioning guide mounted on the work-supporting member at the side of one of the presser members remote from the adjacent presser member.

4. A workholder comprising a substantially flat work supporting plate, a buckle positioning guide mounted on said plate, and a spring-pressed presser device disposed above said plate at one side of the buckleuide, said presser device having a lower face portion adapted to bear over one crossbar of a buckle, and a rib projecting downwardly below and at one side of said lower face portion and adapted to tighten a loop of flexible material around such bar of the buckle.

5. VVork-holding means comprising a worksupporting plate, and a presser device comprising two independently movable sections constituting a rectangularly apertured foot, the first of said sections constituting three side walls of said aperture and the second section constituting the fourth side wall of said aperture.

6. A work-holder comprising a work-support having a sewing aperture, a buckle positioning guide mounted thereon at one side of the sewing aperture and formed with a transverse groove for the central bar of a buckle and a clearance notch for the looped end of a buckle tongue, and a presser device having a sewing aperture above the sewing aperture in the work-support.

7. A work-clamp comprising a support adapted for movement over the bed of a sewing machine, a pair of clamping feet, a pair of clamping feet supporting bars car ried by said support, an equalizer bar connecting said first mentioned bars, and a spring carried by said support and bearing upon said equalizer bar between the ends of the latter.

8. A work-holder consisting of a worksupporting member comprising an article positioning guide-block having an upstanding Wall and a presser-member movable toward and away from the work-supporting member and havinga work-engaging surface disposed closely adjacent said upstanding wall and adapted to bear upon a loop ol? flexible material embracing a bar of the a1 ticle, whereby the loop of material is caused to snugly embrace the bar of the article.

In testimony whereof, I have signed my name to this specification.

JOSEPH VOLLMAN.

Certificate of Correction.

It is hereby certified that Letters Patent N 0. 1,569,902, granted January 19, 1926, upon the application of Joseph Volhna-n, of Elizabeth, New Jersey, for an improvement in Machines for Sewing on Buckles, were enroneonsly issued to the inventor, said Volhnan, whereas said Letters Patent should have been issued to The Singer Mannfaetnntng Compa-ny, of Elizabeth, N. J a Qorpomtton of New Jersey, said eorporation being assignee of the entire interest in said invention, as shown by the record of assignments in this oflice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofice.

Signed and sealed this 23d day of February, A. D. 1926.

[SEAL] WM. A. KINNAN,

Acting Commissioner of Patents. 

